Photographic film cartridge containing time and temperature inte

Details Photographic film cartridge containing time and temperature inte Photographic film cartridge containing time and temperature inte

1997-12-09

1999-08-17

Perkey, W. B.

Photography

Exposure data from film container

396284, 396512, 396578, G03B 1726

Patent

active

059406372

ABSTRACT:
A photographic film cartridge is disclosed comprising a housing with an outer surface, and a time and temperature integrating device for providing a visually observable indication of cumulative thermal exposure on the outer surface, wherein the time and temperature integrating device is thin enough so as to not interfere with performance of the cartridge in a photographic camera and comprises a thermally sensitive image-forming area and indicating indicia in association with the image-forming area for indicating when the film cartridge has been exposed to a predetermined cumulative thermal exposure. In accordance with a second embodiment of the invention, a process for controlling the photofinishing of film contained in a photographic film cartridge comprising a housing with an outer surface, and a time and temperature integrating device for providing an indication of cumulative thermal exposure on the outer surface is disclosed, said process comprising determining from the time and temperature integrating device whether the film has been exposed beyond a maximum level of cumulative thermal exposure, and rejecting the film for photofinishing if the thermal exposure level is beyond the maximum level.

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